| 摘要 |
PROBLEM TO BE SOLVED: To surely remove a bubble staying in a bubble reservoir. SOLUTION: Ink is supplied to a bubble unit 21 from an ink cartridge through first and second ink flow-in holes 91a, 91b. The bubble unit 21 comprises first and second pressurizing chambers 106a, 106b and first and second S-shaped fluid passages in parallel. The ink supplied to the ink flow-in holes 91a, 91b is introduced to first and second ink flow-out holes 93a, 93b through either of them. The ink flow-in holes 91a, 91b and the ink flow-out holes 93a, 93b are positioned to be lower than a ceiling section in the vertical direction with respect to the pressurizing chambers 106a, 106b so that each of the pressurizing chambers 106a, 106b has a structure whereby the bubble tends to stay therein. The cross section area of each of the S-shaped passages is determined such that the bubble hardly stays therein. A part of a wall face of each of the pressurizing chambers 106a, 106b consists of a second film member 51 and a channel resistance is varied by bending of the second film member 51. COPYRIGHT: (C)2005,JPO&NCIPI |
